Statistics · Module 11 · Correlation and linear regression

Regression Lab

Build scatterplots by clicking and dragging while the least squares line, r and the residual squares update live, try to beat the computer at guessing the best line, solve unlimited practice problems with worked solutions, race the clock guessing r, and use regression in the clinic, on the court and at the car lot. Nothing here is graded.

Part 1: Scatterplot Explorer

Click an empty spot to add a point. Drag any point to move it. On a keyboard, focus the picture: arrows move the selected point, N picks the next point, A adds a point and Delete removes one.
Data pointLeast squares lineSquared residualYour line (guess mode)(x̄, ȳ)